getKeys method

Will get a collection of PcoServicesKey objects (expecting many) using a path like this: https://api.planningcenteronline.com/services/v2/songs/1/arrangements/1/keys

Implementation

Future<PcoCollection<PcoServicesKey>> getKeys(
    {PcoServicesKeyQuery? query}) async {
  query ??= PcoServicesKeyQuery();
  var url = '$apiEndpoint/keys';
  return PcoCollection.fromApiCall<PcoServicesKey>(url,
      query: query, apiVersion: apiVersion);
}